import matplotlib.pyplot as plt
from mpl_toolkits.mplot3d import Axes3D
from matplotlib import cm
import numpy as np
from IPython.display import display, Math, Latex
import pylab
import plot_methods
import optimization_methods
%matplotlib inline
my_function = lambda x, y: x**2+2*y**2+0.012*x*y-2*y+x
plot_methods.plot_function(my_function, 'My function')